"This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."

A Marin County Sheriff's Office statement said: "At this time, the Sheriff's Office Coroner Division suspects the death to be a suicide ... but a comprehensive investigation must be completed before a final determination is made."

It added that an investigation into the "cause, manner, and circumstances of the death is currently under way".

A forensic examination is expected to take place today, with toxicology tests to take place later.